<style>
    .injected-text {
        margin-bottom: -25px;
        text-align: center;
    }

    .box {
        border-style: solid;
        border-color: black;
        border-width: 5px;
        text-align: center;
    }

    .yellow-box {
        background-color: yellow;
        padding: 10px;
    }

    .red-box {
        background-color: crimson;
        color: #fff;
        padding: 20px;
        margin: -15px;
    }

    .blue-box {
        background-color: blue;
        color: #fff;
        padding: 20px;
        margin: -15px;
    }
</style>

<div class="box yellow-box">
    <h5 class="box red-box">padding</h5>
    <h5 class="box blue-box">padding</h5>
</div>